Syntheses of Rare Earth Molybdoarsenate Heteropoly Complexes and Their Properties

Abstract

Abstract: In this paper, the preparation of heteropoly compounds (NH₄)₁₇(RE(Assub>2Mosub>17O₆₁)₂) · nH₂O (RE=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Y) is reported. The physical and chemical characters of the new preparative heteropoly compounds were studied by using UV, IR, CV, TG-DTApolarography. It was determined that the condition under which the heteropoly anion RE (Assub>2Mosub>17O₆₁)₂^17- could stably exist in solution is pH=2.8-4.0 at room temperature. The redox properties of rare earth molybdoarsenate complexes in solution and their thermal stabilities were also studied. It was deduced that heteropoly compounds (NH₄)₁₇[RE(As₂Mo₁₇O₆₁)₂] · nH₂Oand K₁₆[Ce(a₂-P₂W₁₇O₆₁)₂] · 50H₂Ohave the same structure.

Key words: Rare earth, Molybdoarsenate complexes, Double electron reduction

TrendMD:

Wang Enbo, Hu Changwen, Zhou Yanxiu, Liu Jingfu . Syntheses of Rare Earth Molybdoarsenate Heteropoly Complexes and Their Properties[J]. Chem. J. Chinese Universities, 1990, 11(4): 340.

References

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